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经营范围
发明名称
Railway traffic controlling apparatus
摘要
申请公布号
US2721932(A)
申请公布日期
1955.10.25
申请号
US19510250484
申请日期
1951.10.09
申请人
WESTINGHOUSE AIR BRAKE COMPANY
发明人
BABCOCK JOEL R.;CADMAN IRA F.
分类号
B61L1/18;B61L21/06;B61L23/22
主分类号
B61L1/18
代理机构
代理人
主权项
地址
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